"Doesn't seem like I'm the person who you really want to say that to," Fred answered, though he didn't like the idea of Percy saying the same to his dad. He wasn't sure that would go over any better now than it had the last time.
Fred thought he ought to say something else. Not apologize, because he hadn't done anything to apologize for. "You wouldn't have wanted us offering our secrets. Or trying to protect you, though we did enough of that you know, just never told you about it. But if we'd come around trying to drag you out of the castle after hours, or showing you secret passages, you'd have turned us in to Filch or taken points or something. Not like you ever really gave us the chance, either." And he hadn't ever minded - they just didn't have personalities that meshed, and he hadn't minded not spending time with Percy, really. But he'd never been malicious, not the way Percy seemed to think he had been.